Overseaming-machine.



PATENTED SEPT. 22, 1903.-

' 0. G.- KRAMER.

OVERSEAMING MACHINE;

APPLICATION nun MAY 24, .1900.

2 SHEETS-SHEET 1 N0 MODEL.

/ariea Gjfiwmer News PETERS 50.. mmn'uo \usmswrrm. u. a

No. 739,550. PATENTED SEPT. 22 1903. C. G. KRAMER.

OVBRSEAMING MACHINE.

APPLICATION FILED MAY 24. 1900.

H0 MODEL. 2 SHEETS-SHEET 2.

UNITED STATES Patented September 22, 1903.

PATENT OEEIcE.

CHARLES G. KRAMER, OF CHICAGO, ILLINOIS, ASSIGNOR TO, THE UNION SPECIAL SEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPO- RATION OF ILLINOIS.

OVERSEAMlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 739,550, dated September 22, 1903.

Application filedllllay 24,1900.

To all whom, it may concern:

Be it known that I, CHARLES G. KRAMER, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Overseaming-Machines, of which the following is a description, reference being had to the accompanying drawings and to the letters of reference marked thereon.

My invention relates to an improvement in sewingmachines, and particularly to overseaming-machines in which a zigzag needle is used, the improvemements being herein :5 shown as applied to a machine of the Union Special overseam type.

The invention consists in various details of construction of the mechanism for imparting to the needle-bar its lateral vibrations whereby greater efficiency results, this mechanism being hereinafter described, and referred to in the appended claims.

The invention is illustrated in the accompanying drawings, in which Y Figure l is a rear view of an overseamingmachine of the Union Special type, embodying my improvements. Fig. 2 is a detatched view of the driving-gear fork and connections for oscillating the rock-shaft through which movement is imparted to the needle-bar gate or frame. Fig. 2 is a detail view showing the manner of pivoting the fork. Fig. 3 is a perspective end view of the needle-bar-snpporting gate or frame with the connections 5 between the rock-shaft andvthe same for oscillating it. Fig. 3 is a front view of the presser-foot, needle, and a portion of the neodie-bar and its gate or frame; and Figs. 4: and 5 are respectively side and top plan views of 40 one of the connecting-links.

In the drawings the driving-shaft, looperoperating mechanism, feed mechanism mechanism for imparting to the needle-bar its upand-down movements, take-up mechanism,

5 and other parts of the sewing-machine proper are of the well-known Union Special type and need not be herein specifically referred to.

Upon the driving-shaftAis mounted a gearwheel B, meshing with a larger gear 0, which on its head carries an eccentric D, embraced Serial No. 17,791. (No model.)

by the arms E of the fork F. This fork F is of the shape shown and at its upper end is sleeved on a rock-shaft G, journaled on the gooseneck of the machine. The face of the forked arm F is provided with a curved slot H, provided with grooves, in which fits a head on the bolt or stud a, this head being adjustable up and down in the slot and adapted to be set in any position by means of the nut I). Olamped around this stud or bolto. is the end of the arm I, which at its opposite end is provided with a head 0, having a pivotal connection with the arm 70, sleeved at its upper end upon the rook-shaft L, journaled in bearing lugs 61 d on the machine-frame. Near the opposite end of said rock-shaft is a downwardlydepending arm M, having set in its lower end a vertically-arranged ball-stud e, to which'is pivoted a horizontally-arranged link N,which at its inner end has a ball-and-stud connec tion with the arm 0, forming a part of the needle-bar gate or frame P.

By the construction described it will be seenv that as the drivingshaft revolves the segmental fork will oscillate on its pivot and cause the rocking of the shaft L in its bearings, and through the link N and arm 0 the needle-bar gate or frame Will have a rocking motion given to it on the upright rod or bar Q, thus moving the needle from side to side,

.making a zigzag line of stitching. By means of the curved slot and adjustable bolt or stud a the amount of sidewise vibration of the needle may be varied.

Having thus described my invention, what I claim, and desire to secure by Letters Patout, is

1. In a sewing-machine the combination with the stitch-forming mechanism including a needle-bar, a driving-shaft, means for transmitting vibratory movement to the needlebar from the driving-shaft, including a rockshaft, extending lengthwise of the machineframe, and journaled in bearings thereon, intermediate connections between the driving-shaft and the rock-shaft,'said intermediate connections including a member driven by connections from the main shaft and having a portion extending vertically above the main shaft, and a relatively short connection between said member and the rock-shaf t, with connections between the opposite ends of the rock-shaft and the needle-bar; substantially as described.

2. In a sewing-machine, the combination with the stitch-forming mechanism, includingshort connection between the vertical portion of the oscillating member. and the rock-shaft depending arm, and connections between the opposite ends of the rock-shaft and the needlebar; substantially as described.

3. In a sewing-machine, the combination with the stitch-forming mechanism including a needle-bar, a driving-shaft, means for transmitting vibratory movement to the needlebar from the driving-shaft, including arock-v shaft extending lengthwise of the machineframe, and journaled in bearings thereon, intermediate connections between the drivingshaft and-the rock-shaft, said intermediate connections including a member oscillated by the main shaft and having a vertical portion extending above the same, an arm depending from the rock-shaft, and a relatively short connection between the vertical portion of the oscillating member and the rockshaft depending arm, and connections between the opposite ends of the rock-shaft and the needle-bar, including a horizontal link having a free-joint connection at one end with the arm depending from the rock-shaft and at the other end with an arm extending horizontally from the needle-bar; substantially as described.

4. In asewing-machine in combination with stitch-forming mechanism including a needle-bar, a driving-shaft, means for transmitting vibratory movement to the needle-bar from the driving-shaft, including a rockshaft, extending lengthwise of the machineframe and journaledin bearings thereon, intermediate connections between the drivingshaft and the rock-shaft including a gearwheel on the driving-shaft, a shaft arranged above the same, with an eccentric thereon, a pivoted fork, engaging said eccentric, and connections between the pivoted fork and the rock-shaft, and connections between the opposite end of the rock-shaft, and the needlebar; substantially as described.

5. In a sewing-machine the combination with stitch-forming mechanism including a needle-bar, a driving-shaft, means for transmitting vibratory movement to the needlebar from the driving-shaft, including arockshaft, extending lengthwise of the machineframe, and journaled in bearings thereon, intermediate connections between the drivingshaft and the rock-shaft, including an arm or crank projecting from the rock-shaft, a driven member above the main shaft and operated thereby, and a relatively short connection between said driven member and the projection on the rock-shaft with connections between the opposite end of the rock-shaft and the needle-bar; substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES G. KRAMER.

Witnesses:

CHESTER MONEIL, JULIUS SHIRE. 

